25 - 15 -80 = 10 -80 = -70

26 -6 -64 = 20 -64 = -44

27 + 3 -48 = 30 -48 = - 18

28 + 12 -32 = 40 -32 = 8

29 + 2 1 - 16 = 50 - 16 = 34

30 + 30 + 0 = 60 + 0 = 60

3 1 + 39 + 16 = 70 + 16 = 86

32 + 48 + 32 = 80 + 32 = 1 12

33 + 57 + 48 = 90 + 48 = 138

34 + 66 + 64 = 100 + 64 = 164

35 + 75 + 80 = 1 10 + 80 = 190

36 + 84 + 96 = 120 + 96 = 2 16

37 + 93 + 1 12 = 130 + 1 12 = 242

38 + 102 + 128 = 140 + 128 = 268

39 + 1 1 1 + 144 = 150 + 144 = 294

40 -30 - 140 = 10 - 140 = - 130

4 1 -2 1 - 124 = 20 - 124 = - 104

42 - 12 - 108 = 30 - 108 = -78

43 -3 -92 = 40 -92 = -52

44 + 6 -76 = 50 -76 = -26

45 + 15 -60 = 60 -60 = 0

46 + 24 -44 = 70 -44 = 26

47 + 33 -28 = 80 -28 = 52

48 + 42 - 12 = 90 - 12 = 78

49 + 5 1 + 4 = 100 + 4 = 104

50 + 60 + 20 = 1 10 + 20 = 130

5 1 + 69 + 36 = 120 + 36 = 156

52 + 78 + 52 = 130 + 52 = 182

53 + 87 + 68 = 140 + 68 = 208

54 + 96 + 84 = 150 + 84 = 234

55 -45 -200 = 10 -200 = - 190

56 -36 - 184 = 20 - 184 = - 164

57 -27 - 168 = 30 - 168 = - 138

58 - 18 - 152 = 40 - 152 = - 1 12

59 -9 - 136 = 50 - 136 = -86

60 + 0 - 120 = 60 - 120 = -60

6 1 + 9 - 104 = 70 - 104 = -34

62 + 18 -88 = 80 -88 = -8

63 + 27 -72 = 90 -72 = 18

64 + 36 -56 = 100 -56 = 44

65 + 45 -40 = 1 10 -40 = 70

66 + 54 -24 = 120 -24 = 96

67 + 63 -8 = 130 -8 = 122

68 + 72 + 8 = 140 + 8 = 148

69 + 8 1 + 24 = 150 + 24 = 174

70 -60 -260 = 10 -260 = -250

7 1 -5 1 -244 = 20 -244 = -224

72 -42 -228 = 30 -228 = - 198

73 -33 -2 12 = 40 -2 12 = - 172

74 -24 - 196 = 50 - 196 = - 146

120+90 120×5 230+52+70 1.5×4

148+37 420×20 236-76- 136 2.5×8

54+97 70×80 84÷6

Second, the application problem

1. The king of stories 12 yuan, 25 yuan, 100,000 copies each. Why? How much does it cost to buy 8 copies of The King of Stories and 8 copies of 100,000 Why?

There are 38 boys and 26 girls in Class 42. How many groups can a * * * group of eight people take part in the activity of cleaning up small advertisements?

3. Uncle Li brought 250 yuan to buy fertilizer, bought five bags of fertilizer, and left 25 yuan. What's the price of each bag of fertilizer?

4. A road maintenance team builds a road, 24 meters a day. 15 days later, there is still 130 meters left. How long is this road?

Zhang always takes money from 200 yuan to buy two volleyballs and four skipping ropes. Every volleyball 48 yuan, every skipping rope 12 yuan. How much is left?

6. A school library has a collection of 15000 books, and a school library has a collection of 23000 books. How many books are there in school B than in school A?

7. Mingguang Village handed in 257,800 Jin of rice, and Daotian Village handed in 325,960 Jin of rice. How many Jin of rice did the two villages pay?

8. Refrigerator 2400 yuan, color TV 3500 yuan, washing machine 1650 yuan. How much does it cost to buy three kinds of home appliances?

9. Students plant trees in spring. Grade four is 88, grade five is 96, grade six is 65,438+004. How many trees have students planted in grade three?

10. Xiaohong scored 88 points, 96 points, 94 points, 90 points and 82 points in the final exam of Chinese, mathematics, nature, society and English last semester. What is the average score of Xiaohong's five subjects?

1 1. Grain bought 328kg of cabbage the day before yesterday,156kg of cabbage yesterday and 272kg of cabbage today. How many Jin of cabbage did you buy in the canteen for 3 days?

12. Students collect plant specimens, class four and class one 132, class four and class two 256, class four and class three 168. How many plant specimens were collected in Grade Four and Grade One?

13. Xiaohong read a 480-page story book. The first week, she read 136, and the second week, she read 164. How many pages has Xiaohong just read?

14. The first bus runs at 3 o'clock 105km, and the second bus runs at 80km. How many kilometers does this bus travel per hour on average?

15. After 2400 tons of cement were used in a construction site, 800 tons were transported away. At this time, there is 1400 tons of cement on the construction site. How many tons of cement are there on the construction site?

16. The school is located between Xiaogang's home and Xiaoli's home. Xiao Gang and Xiao Li walk from home to school at the same time. Xiao Gang walks 65 meters per minute, and Xiao Li walks 70 meters per minute. Five minutes later, the two met at the school gate. How many meters is there between their two houses?

17. the distance between city a and city b is 680 kilometers. A car drives from city A to city B. After 4 o'clock, there are still 440 kilometers from B. What is the average speed of this car?

18. The average length of Wang Le's step is 63 cm. He walked 266 steps from one end of the playground to the other. How long is the playground?

19. Yucai Primary School has 7 18 students, and there are 18 primary schools in the township. How many pupils are there in this town?

20. A noodle maker. The wholesale price of each machine is 86 yuan. Wang Jing wants to buy 26 sets. Is it enough for him to bring 2500 yuan?

Third, fill in the blanks

1. The results of the fifth population census are announced: China's total population is1295,330,000, the number written with "ten thousand" is (), and the mantissa after omitting "hundred million" is about ().

2. The smallest eight-digit number consisting of eight different numbers that are not zero is (), which is pronounced as (), and the mantissa after omitting "ten thousand" is about ().

3. Fill in ">" and "

54070800000 ○ 5470800000 480,000 ○ 4800 1

24×9○205 79× 10○79×9+i

4. The line segment has () endpoints, and the ray has () endpoints.

5. At the () point on the clock face, the angle between the hour hand and the minute hand is a right angle, and at the 6 o'clock on the clock face, the angle between the hour hand and the minute hand is () degrees, which is the () angle.

6. Arrange acute angles, right angles, obtuse angles, right angles and rounded corners in the following order.

( )>( )>( )>( )>( )

7, 4293÷4 mouth, in order to make the quotient two digits, mouth can fill in ().

8.A ÷ 2 1 = 20 ... (), the maximum number of () can be filled in the brackets, and the maximum dividend is ().

9. The product of two factors is 100. If one factor remains unchanged and the other factor is reduced by 5 times, the product is ().

Iv. true or false questions

1, six digits, about 600,000 after "rounding", and the maximum number is 59,999. ( )

2. Half of an obtuse angle must be an acute angle. ( )

3. Two parallelograms with the same shape can be combined into a parallelogram. ( )

4. Units, ten, hundred, thousand and ten thousand are all counting units. ( )

5. The propulsion rate between every two counting units is 10. ( )

Five, multiple choice questions

1, in the following figures, only one zero is ().

a、803070 B、8030700 C、8003700

2. Look at an angle of 15o with a magnifying glass with a magnification of 100. The degree of the angle you see is ().

a、 150o B、 150 o C、 1500o

You can draw a straight line between two parallel lines.

A, 1 B, 2 C, countless

4, when using the calculator operation, if you find that the input data is incorrect, you can use the () key to clear the error.

a、OFF B、CE C、ON/C

5, the comparison of straight lines, rays and line segments ()

A, the straight line is longer than the ray b, the ray is longer than the line segment c, and the line segment is longer than the straight line d, which cannot be compared.

6.A ÷ B = 9...5. If both A and B are multiplied by 100, then the quotient is () and the remainder is ().

9 B、900 C、5 D、500

Sixth, drawing questions

(1) Draw a parallelogram in the space below (the size is self-determined) to make the height of the parallelogram. (3 points)

Draw a line segment and divide the parallelogram into triangle and trapezoid. (2 points)

(3) Measure the degree of ∠ 1 and mark it. (2 points)

Original address of Lianshan courseware:/shti/shi/44287.htm.

VII. Application Problems

20. A noodle maker. The wholesale price of each machine is 86 yuan. Wang Jing wants to buy 26 sets. Is it enough for him to bring 2500 yuan?

2 1. A pay-off worker can put 304 meters of rice a day. /kloc-how many meters can he string in 0/5 days?

22. A rectangular piece of land is 205 meters long and 88 meters wide. How many square meters is its area?

23. The road repair team has built a road, which needs to be repaired 185 meters every day. It has been built for 20 days, and 128 meters has just been completed. How long is this road?

24. The school is going to buy a batch of extracurricular reading materials and distribute them to classes 12 from grade one to grade six, with each class 105 and 88 copies for kindergartens. How many extracurricular books should schools buy?

25. The school canteen bought a new pile of coal, burning an average of 420 Jin a day, burning for 14 days, leaving 190 Jin. How many kilograms is this pile of coal?

26. A car with an approved load of 5 tons is loaded with 160 bags of wheat, each bag of wheat is 25 kilograms. Is this car overloaded?

27. A forest farm should plant 65 rows of saplings with 24 trees in each row. 960 trees have been planted. How many trees should be planted just to accomplish this task?

28. The school choir ordered 60 sets of clothes, including 54 yuan for each coat and 38 yuan for each pair of trousers. How much is a * * *?

29. The average scores of Xiao Ming, Xiao Gang and Xiao Hong in the math contest were 94, of which Xiao Ming got 92 and Xiao Hong got 95. How many points did Xiaogang get in the exam?

30. A car travels from A to B at a speed of 45 km/h and arrives at 6 o'clock. After I came back, I increased my speed. It took only five hours to get back from B to A ... How many kilometers per hour did I go back?

3 1. Yucai Primary School bought 46 sets of desks and chairs, each desk 1 15 yuan, each chair 45 yuan. How much does it cost to buy these desks and chairs?

Students make 240 red flowers and 80 yellow flowers. How many times the number of red flowers is that of yellow flowers?

There are 350 comic books, 50 in each class. Can you divide them into several classes?

There are 400 roses in the flower shop, and every 20 roses are tied into a bunch. How many bundles can they be tied into?

35. Uncle Li Can transported 80 bags and 640 bags of fertilizer by truck at a time. How many times can he deliver it?

36. The school held a sports meeting. There are 3 12 athletes in class12. How many athletes are there in each class on average?

37. The school playground is 35 meters long and covers an area of 840 square meters. What is the width of the playground?

38. Master Zhang processed 160 parts in five days. According to the efficiency of the sample, how many days does it take to process 4 16 pieces?